Hi, I'm solving the integral of sec x. I'm using a t sub ie I've integrated to Now I believe I have to multiply inside the brackets by so I'll end up with Could someone explain that to me? Thank You.
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Originally Posted by minusb Hi, I'm solving the integral of sec x. I'm using a t sub ie I've integrated to Now I believe I have to multiply inside the brackets by so I'll end up with Could someone explain that to me? Thank You. try the substitution This gives the integral
Thanks, I know that version... The question is asking to use t=tan(x/2) substitution.
Originally Posted by minusb I've integrated to Well, you have done it all! Just resubstitute and note that , then use the tangent addition identity:
Originally Posted by TheCoffeeMachine Is this a common identity that is equal to secx + tanx?
Double post...
Last edited by minusb; Nov 29th 2010 at 05:25 AM.
Originally Posted by minusb Is this a common identity that is equal to secx + tanx? Why do you have to show that they are equal? This is the classical integral of ! If they have asked you to use that substitution, it should really be what they wanted!
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